Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province
Remanent magnetization in five Indin, three Dogrib, two Archean, and one Mackenzie dyke contact zone(s) from the Yellowknife area of the Canadian Precambrian Shield has been studied in order to establish the ambient temperature of the host rock and the depth of burial of the present erosion surface...
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Canadian Science Publishing
1985
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crcansciencepubl:10.1139/e85-190 2024-09-15T18:03:55+00:00 Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province Schwarz, Erik J. Buchan, Kenneth L. Cazavant, Alain 1985 http://dx.doi.org/10.1139/e85-190 http://www.nrcresearchpress.com/doi/pdf/10.1139/e85-190 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 22, issue 12, page 1793-1802 ISSN 0008-4077 1480-3313 journal-article 1985 crcansciencepubl https://doi.org/10.1139/e85-190 2024-07-25T04:10:06Z Remanent magnetization in five Indin, three Dogrib, two Archean, and one Mackenzie dyke contact zone(s) from the Yellowknife area of the Canadian Precambrian Shield has been studied in order to establish the ambient temperature of the host rock and the depth of burial of the present erosion surface at the time of intrusion. A positive baked-contact test for an Aphebian Indin dyke demonstrates the primary nature of the dyke magnetization. From this contact, eight individual specimen determinations of the ambient host-rock temperature at the time of intrusion yield an average of 211 °C, with a standard deviation of 18 °C and probable error of ± 36 °C. Assuming a paleogeothermal gradient of 44 °C/km (± 30%) the estimated depth of burial of the present erosion surface is [Formula: see text]. None of the remaining contacts yield estimates of the depth of burial. However, the results from the three Dogrib contacts illustrate complications such as chemical overprinting that must be considered when analysis is made of magnetization in igneous contact zones. Thus, only one spot reading of the depth of burial of the area has been obtained. Correlation of the Indin result with a result from the Matheson area of Ontario and with stratigraphic indicators is uncertain because of large intervening distances and the occurrence of younger structural zones. Article in Journal/Newspaper Dogrib Yellowknife Canadian Science Publishing Canadian Journal of Earth Sciences 22 12 1793 1802 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Remanent magnetization in five Indin, three Dogrib, two Archean, and one Mackenzie dyke contact zone(s) from the Yellowknife area of the Canadian Precambrian Shield has been studied in order to establish the ambient temperature of the host rock and the depth of burial of the present erosion surface at the time of intrusion. A positive baked-contact test for an Aphebian Indin dyke demonstrates the primary nature of the dyke magnetization. From this contact, eight individual specimen determinations of the ambient host-rock temperature at the time of intrusion yield an average of 211 °C, with a standard deviation of 18 °C and probable error of ± 36 °C. Assuming a paleogeothermal gradient of 44 °C/km (± 30%) the estimated depth of burial of the present erosion surface is [Formula: see text]. None of the remaining contacts yield estimates of the depth of burial. However, the results from the three Dogrib contacts illustrate complications such as chemical overprinting that must be considered when analysis is made of magnetization in igneous contact zones. Thus, only one spot reading of the depth of burial of the area has been obtained. Correlation of the Indin result with a result from the Matheson area of Ontario and with stratigraphic indicators is uncertain because of large intervening distances and the occurrence of younger structural zones. |
format |
Article in Journal/Newspaper |
author |
Schwarz, Erik J. Buchan, Kenneth L. Cazavant, Alain |
spellingShingle |
Schwarz, Erik J. Buchan, Kenneth L. Cazavant, Alain Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province |
author_facet |
Schwarz, Erik J. Buchan, Kenneth L. Cazavant, Alain |
author_sort |
Schwarz, Erik J. |
title |
Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province |
title_short |
Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province |
title_full |
Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province |
title_fullStr |
Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province |
title_full_unstemmed |
Post-Aphebian uplift deduced from remanent magnetization, Yellowknife area of Slave Province |
title_sort |
post-aphebian uplift deduced from remanent magnetization, yellowknife area of slave province |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/e85-190 http://www.nrcresearchpress.com/doi/pdf/10.1139/e85-190 |
genre |
Dogrib Yellowknife |
genre_facet |
Dogrib Yellowknife |
op_source |
Canadian Journal of Earth Sciences volume 22, issue 12, page 1793-1802 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e85-190 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
22 |
container_issue |
12 |
container_start_page |
1793 |
op_container_end_page |
1802 |
_version_ |
1810441352817672192 |